@article{GDZPPN002109727,
title = {Geodesics on S2 and periodic points of annulus homeomorphisms.},
journal = {Inventiones mathematicae},
volume = {110},
year = {1992},
pages = {403-418},
zbl = {0766.53037},
url = {http://dml.mathdoc.fr/item/GDZPPN002109727}
}
Franks, John. Geodesics on S2 and periodic points of annulus homeomorphisms.. Inventiones mathematicae, Tome 110 (1992) pp. 403-418. http://gdmltest.u-ga.fr/item/GDZPPN002109727/